<template>
  <view>
    <view class="goods-item">
      <!-- 左侧的盒子 -->
      <view class="goods-item-left">
        <radio :checked="goods.goods_state" color="#c00000" v-if="showRadio" @click="radioClickHandler"></radio>
        <image :src="goods.goods_small_logo || defaultPic" class="goods-pic"></image>
      </view>
      <!-- 右侧的盒子 -->
      <view class="goods-item-right">
        <!-- 商品名字 -->
        <view class="goods-name">{{goods.goods_name}}</view>
        <view class="goods-info-box">
          <!-- 商品价格 -->
          <view class="goods-price">￥{{goods.goods_price | tofixed}}</view>
          <!-- 商品数量 -->
          <uni-number-box :min="1" :value="goods.goods_count" v-if="showNum" @change="numChangeHandler">
          </uni-number-box>
        </view>
      </view>
    </view>
  </view>
</template>
<script>
  export default {
    name: "my-goods",
    props: {
      // 定义 props 属性，用来接收外界传递到当前组件的数据
      goods: {
        type: Object,
        default: {}
      },
      // 是否展示图片左侧的 radioss
      showRadio: {
        type: Boolean,
        // 默认情况下，不会展示radio组件
        default: false
      },
      // 是否展示价格右侧的 NumberBox 组件
      showNum: {
        type: Boolean,
        default: false,
      }
    },
    data() {
      return {
        // 默认的空图片
        sdefaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png',
      };
    },
    filters: {
      tofixed(num) {
        // 转化为数字后，保留两位小数。。
        return Number(num).toFixed(2)

      }
    },
    methods: {
      //radio组件的 点击事件处理函数
      radioClickHandler() {
        this.$emit('radio-change', {
          goods_id: this.goods.goods_id,
          goods_state: !this.goods.goods_state
        })
      },
      // 监听到了NumberBox 组件数量变化的事件s
      numChangeHandler(val) {
        console.log(val); //val最新的商品数量值。。数据类型是字符串
        // 触发外界绑定的radio-change 事件---> 
        // 外界的事件的事件对象e就会有 商品ID和商品数量了！！
        this.$emit('num-change', {
          goods_id: this.goods.goods_id,
          goods_count: +val //隐式转换---> 转换成数值型

        })
      }
    },
  }
</script>

<style lang="scss">
  .goods-item {
    width: 750rpx;
    box-sizing: border-box;
    display: flex;
    padding: 10px 5px;
    border-bottom: 1px solid #f0f0f0;

    .goods-item-left {
      margin-right: 5px;
      display: flex;
      justify-content: space-between;
      align-items: center;

      .goods-pic {
        width: 100px;
        height: 100px;
        display: block;
      }
    }

    .goods-item-right {
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;

      .goods-name {
        font-size: 13px;
      }

      .goods-info-box {
        display: flex;

        justify-content: space-between;
        align-items: center;

        .goods-price {
          color: #c00000;
        }
      }
    }
  }
</style>
